Rock Varnish of the World's Deserts

(A)

(B)

(C)

(D)

Figure Caption
(A) Varnished flaked cobble from the west bank of the Colorado River near Laughlin in
the Mojave Desert of western USA. (B) Varnished fluvial boulder
from the north flank of Tian Shan in the Gürbantongüt Desert of western China.
(C) Varnished rocks on a desert pavement surface near Timna in the Negev Desert of southern Israel.
(D) Varnished glacial-fluvially polished boulder from Rio Mendoza Valley in the Patagonia Desert of
central Argentina.